Browse by Subject "silicon"

This thesis presents the results of three studies of the photoluminescent properties of Si and Ge at low temperature. The first study is presented in Chapter 2 and deals with the transport of photoexcited electron-hole ...

Biochemical agents, including bacteria and toxins, are potentially dangerous and responsible for a wide variety of diseases. Reliable detection and characterization of small samples is necessary in order to reduce and ...

In this thesis, two major modifications to an ultra-high-vacuum scanning tunneling microscope system are described: an update to the cooling plate structure for more effective cooling of the dipstick and sample holder, and ...

This thesis describes the first experimental studies of isolated energy levels
with the aid of the University of Illinois bremsstrahlung monochromator. The
studies had as objectives both the development of techniques ...

The production and propagation of high-frequency acoustic phonons in silicon and
GaAs are studied at low temperatures (~ 2K) using the phonon imaging technique. In this
technique, a heat source is provided by a focused ...

We studied the electronic properties of silicon nanoparticles with sizes rang-
ing from 2.9 to 1 nm in diameter. Using a scanning tunneling microscope we
studied the electronic structure of the particles. Resonant tunneling ...

This thesis focuses on the development of highly doped silicon as a mid-infrared (mid-IR) plasmonic metal. There has been great interest in designing devices and structures that effectively interact with the mid-IR spectrum ...

Nanostructures typically exhibit thermo-physical properties that are different from their bulk counterparts. The size dependence of thermo physical properties is attributed to changing energy and mass transport phenomenon ...

A new method for studying the recombination-generation and
optical behavior of impurities in semiconductors is presented. This
method is known as the impurity photovoltaic effect. The basic idea
of the impurity photovoltaic ...

A new experimental technique, using the equivalent circuit of semiconductor surface, has been used to study the electron mobility in the surface inversion layer near the conductance threshold. This method enables us to ...

Materials at the micrometer and submicrometer scale exhibit mechanical properties that are substantially different from bulk materials. With the increasing miniaturization of devices, accurate characterization of micro/nanoscale ...

This thesis presents the results of a wide ranging study of the transport properties of photo-excited free excitons (FE) and electron-hole droplets (EHD). The mobilities of both species are largely controlled by interaction ...